The pint-sized fashion designer was spotted tagging along for a lunch date with her sister Mary-Kate and 42-year-old Olivier - the half-brother of former French President Nicolas Sarkozy - in New York City on Saturday. The group was seen dining at upscale Italian eatery Sant Ambroeus in the city's trendy West Village.

The 25-year-old former Weeds actress has been dating French-American banker Olivier for almost seven months and the couple are rumoured to have officially moved in to his plush new East Village townhouse together recently.

According to city documents filed on September 10, Olivier purchased the 5-story love nest on August 2 after selling his previous property for $6.25 million in February.

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The Martha Marcy May Marlene actress - the younger sister of Mary-Kate and Ashley Olsen - explained while the term has helped her launch her career, she wants to be an "older lady" when she retires from acting.

"I always joke that the term 'It girl' is such an ephemeral thing. And I'm really tying to have a long career until I'm ready to retire as an older lady. So for me, it's really nice that it has helped me kind of start my career and I'm so thankful that it got the attention that it did. Because now I'm in such a cool position of choosing really interesting roles."

While Elizabeth admits she doesn't talk with her A-list siblings "directly about work," they do advise her on what roles she should take: "We don't really talk too directly about work. If we do, it's more just about, 'I'm having a hard time making a choice, can you help me out?' Just anything that you'd ask anyone in your family if you trust their opinions. But, really, all they've done their entire lives was work and they're really amazing workers. They're such strong women that have so many different companies to take over and run and it's just amazing to have those types of women in your family."

The 25-year-old star - who made her acting debut aged just nine months alongside her twin Mary-Kate in Full House - hasn't appeared in a film since 2004's New York Minute and has no plans to return in front of the camera.

"We worked non-stop until we were 18. Then we decided to take a break and go to school - and that was when we decided to question whether we would carry on in entertainment. It was time to step behind the process. I wanted to work on other things. It doesn't mean I'm not interested in Hollywood, I like the way it operates and the people who are involved and the sense of possibility. But if I ever do get back in, it's not going to be as an actress."

Though Mary-Kate has made some film and TV appearances since New York Minute - including an eight-episode stint in Weeds - she also thinks it "felt right" to step away from acting.

Elizabeth Olsen, younger sister to twin siblings Mary-Kate and Ashley Olsen, has gone from little sis to very talked-about actress. Olsen is in two films that will be shown at the Sundance Film Festival that are getting tons of buzz.

Olsen plays the lead in Silent House, a movie about a haunted house. She will also be featured in Martha Macy May Marlene, a film about a young woman trying to adjust to life outside the cult she’s just escaped.

“To have a lead be an unknown -- it’s kind of a risk for people to take. And so the fact that they took that risk . . . made my year, my life, I don’t know! It was really exciting.”

Olsen, 21, is three years younger than her famous twin siblings. “I think it’s a really weird part of this business,” she said of being chased by paparazzi, something she’s seen happening to Ashley and Mary-Kate Olsen. “When I would go shopping with my sisters when I was younger, it would be dangerous. People would almost get us into car accidents. I just think it’s crazy in general but I want to be an actor.”